Answer:
$14 per lb
Step-by-step explanation:
Given:
- Brand Y = $18 / lb
- Special Blend = $17 / lb
Let x be the price per lb of brand X coffee
3 lbs of brand X coffee + 9 lb of brand Y coffee = 12 lbs of special blend
⇒ 3x + 9(18) = 12(17)
⇒ 3x + 162 = 204
⇒ 3x = 42
⇒ x = 14
Therefore, brand X costs $14 per lb
Answer:
y=3x-10
Step-by-step explanation:
To find equation of the line passing through points
and A(xa, ya) and B(xb, yb)
, we use formula: y-ya = yb-ya/xb-xa (x-xa)
In this example we have xa=
6 ,ya=
8 , xb=5
and yb=5
. So,
y-ya= yb-ya / xb-xa (x-xa)
y-8 = 5-8/ 5-6 (x-6)
y-8= 3(x-6)
y-8= 3x-18
y-8= 3x-10
y = 3x - 10
Answer:
100.04
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
1. In order to determine the inequality, you must first solve the solution set to determine what x is less than.
So you would do this:
1 + 2x < 9 Subtract 1
2x < 8 Divide by 2
x < 4
2. Next, you need to understand the difference between an open circle and a closed circle shown on the solution sets.
An open circle is equal to the following inequalities:
<, >
A Closed circle represents inequalities in situations such as:
greater than or equal to, or less than or equal to
3. Because the inequality above represents only less than or greater than the inequality sets should have an open circle being used.
Since x is less than 4 it should be moving to the left of the line inequality set.
If we set both equations equal to each other, we have 7/x = 4/5, giving us the answer x = 8 3/4, or x = 8.75
